This afternoon my father in law and I went to shoot his new muzzle loader. I brought mine to shoot as well. We both have the same type, so I was showing him the ropes. I had him blow a primer to clear the breech of oil before we started shooting. No big deal, he puts a patch down the barrel, puts in his primer...pop. Piece of cake. A little while later I had him perform the same manuever on mine. Puts a patch down the barrel, puts in a primer...BOOOOOOMMMM. The gun goes flying out of his hands and lands on the ground behind him. I had a charge in the barrel from last year that I never pulled out. I have never left a charge in the barrel over the off season. I was totally shocked. We are both gun safety fanatics, so everyone was behind the firing line, and gun was pointed in a safe direction, no material loss. A very inexpensive lesson. This was the first firearms "incident" I have ever had, and I have been shooting a long time. Thank God for maintaining vigilance when it comes to gun safety, I can think of a lot of worse endings for this story. The worst of it is that I might have to buy a new barrel, the ramrod shattered and scarred my barrel down the entire length. Good night, and stay safe.